it.unibz.inf.ontop.iq.node.impl

Class JoinLikeNodeImpl

java.lang.Object

it.unibz.inf.ontop.iq.node.impl.QueryNodeImpl

it.unibz.inf.ontop.iq.node.impl.CompositeQueryNodeImpl

it.unibz.inf.ontop.iq.node.impl.JoinOrFilterNodeImpl

it.unibz.inf.ontop.iq.node.impl.JoinLikeNodeImpl

All Implemented Interfaces:

JoinLikeNode, JoinOrFilterNode, QueryNode, Cloneable

Direct Known Subclasses:

InnerJoinNodeImpl, LeftJoinNodeImpl

public abstract class JoinLikeNodeImpl
extends JoinOrFilterNodeImpl
implements JoinLikeNode

Field Summary

Fields inherited from class it.unibz.inf.ontop.iq.node.impl.JoinOrFilterNodeImpl

substitutionFactory, substitutionTools, termFactory, typeFactory, unificationTools

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JoinLikeNodeImpl(Optional<ImmutableExpression> optionalJoinCondition, TermNullabilityEvaluator nullabilityEvaluator, TermFactory termFactory, IntermediateQueryFactory iqFactory, TypeFactory typeFactory, SubstitutionFactory substitutionFactory, ImmutableUnificationTools unificationTools, ImmutableSubstitutionTools substitutionTools)

Method Summary

Modifier and Type	Method and Description
protected void	checkNonProjectedVariables(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children) Checks that non-projected variables are not shared among children
it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable>	getRequiredVariables(IntermediateQuery query) Set of variables which, individually, must be provided by at least one child, INDEPENDENTLY OF THE REQUIREMENTS OF THIS NODE'S ANCESTORS.

Methods inherited from class it.unibz.inf.ontop.iq.node.impl.JoinOrFilterNodeImpl

checkExpression, computeNotInternallyRequiredVariables, getLocallyDefinedVariables, getLocallyRequiredVariables, getLocalVariables, getNullabilityEvaluator, getOptionalFilterCondition, getOptionalFilterString, isDistinct, isFilteringNullValue

Methods inherited from class it.unibz.inf.ontop.iq.node.impl.QueryNodeImpl

clone

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface it.unibz.inf.ontop.iq.node.JoinLikeNode

changeOptionalFilterCondition

Methods inherited from interface it.unibz.inf.ontop.iq.node.JoinOrFilterNode

getOptionalFilterCondition

Methods inherited from interface it.unibz.inf.ontop.iq.node.QueryNode

acceptNodeTransformer, acceptVisitor, clone, getLocallyDefinedVariables, getLocallyRequiredVariables, getLocalVariables, isEquivalentTo, isSyntacticallyEquivalentTo, isVariableNullable

Constructor Detail

JoinLikeNodeImpl

protected JoinLikeNodeImpl(Optional<ImmutableExpression> optionalJoinCondition,
                           TermNullabilityEvaluator nullabilityEvaluator,
                           TermFactory termFactory,
                           IntermediateQueryFactory iqFactory,
                           TypeFactory typeFactory,
                           SubstitutionFactory substitutionFactory,
                           ImmutableUnificationTools unificationTools,
                           ImmutableSubstitutionTools substitutionTools)

Method Detail

getRequiredVariables

public it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> getRequiredVariables(IntermediateQuery query)

Description copied from interface: QueryNode

Set of variables which, individually, must be provided by at least one child, INDEPENDENTLY OF THE REQUIREMENTS OF THIS NODE'S ANCESTORS. This may extend locally required variables. For instance, for a join node, this includes variables used in implicit joining conditions

Specified by:

getRequiredVariables in interface QueryNode

checkNonProjectedVariables

protected void checkNonProjectedVariables(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
                                   throws InvalidIntermediateQueryException

Checks that non-projected variables are not shared among children

Throws:

InvalidIntermediateQueryException